Process for treating adhesive material.



sheet is then coated on'the opposite side UNITED L sir-Arms. PATENT OFFICE.

THOMAS SHAW HALL, on NEW YORK,

N. Y., ASSIGNOR TO'FREDRIGKA ISABELL TAYLOR HALL, OF NEW YORK, N. Y; PROCESS FOR TREATING ADHESIVE MATE IAL.

Specification of Letters Patent. Applieatioufiled December 4,1903. Serial 110.18%,749.

Patented Dec. 25, 1906.

materi l of any kind but in particular it refers to materials of aporous nature, such as paper, wood, or any textile or felted fabric. Adheslve textile fabrics in the form of sheets or strips are used for a great many dif-- ferent purposes and under a great many d' and as a result of very I ferent conditions, large andvarying use it has been found that ifsheets of textile fabric or material impregnated in the usual manner with an adhesive substance are imposed one upon the other and subjected to. a slight pressure and a moderate degree of heat they will adhere onetothe other in such a manner that it will become almost impossible to separate them 5 without mutilation.

The object of this invention is to devise a process of treating textile or other material with a coating of an adhesive substance in such a-manner as .to obviate the above-men- 3 tioned and other diificulties'.

This process may be carried out by means of various a paratus and with many modifications the ollowing description illustrating one method of employing this process: The

sheet or strip of textile or other material is first coated on one side with an adhesive substance, such as glue, mucilage, or the like. This may be done in any convenient manner,

as by dipping one surface of the material in a 4 bath containing the adhesive substance in solution or. by any other suitable means whereby a substantially even coating of the I adhesive-substance is a plied to the surface of the material. a The siheet or strip is then dried by natural or artificial heat or in a current of air, thereby evaporating all'the volatile matter from the adhesive substance which has adhered tothe fabric. When the material is thoroughly dried, the stripror which the adhesive substance has been a plied 'with a waxy substance, such as parafliiu 'parafiin or the like. This may be done by a plying the substance with a brush, by dipping the material into the substance when the substance is rendered liquid-as, for example, a

bath of melted paraflin-or in any other appropriate manner. The object of thus treating the material is to prevent the adhesive substance from penetrating through the material, so that it is confined to the surface of the fabric, where it is desired, and, further, it prevents the adhesion of the adhesive face of "one piece of fabric to the back of the next piece when the pieces are arranged in piles and. are subjected to heat or pressure, or both. The material thus coated is then dried in an appropriate manner and ready for use as desired.-

Without describing the many modifica tions of which this invention is capable or the various manners by which this process can be carried out and without limiting myself to the above-described apparatus for attaining this result, what I claim as the novel and characteristic features of this my invention are the following:

when thus dried is 1. As a new article of manufacture,an adhesive sheet of fabric coated on one-side with a film coating of dried adhesive and on the other with a film coating of a waxy substance.

2. 'As a new article of manufacture, an adhesive sheet of fabric coated on one side with a film coating of dried glue and on the other with a film coating of parafiin.-

3. The process of preparin adhesive sheets which consists in superfic'a side with a fluid adhesive, sharply the coated sheet to form-a film coating1 of said adhesive a dried condition, and t en filming the other side with a waxy substance.

4. The process of preparing adhesive sheets which consists in superficially coating one side with fluid glue, sharply the coated sheet to form a film coating of dried glue and then filming the other side with Signed this 3d'day. of December, 1903, at New York,N. Y. I

Witnesses:

WALTER F. HINGKLEY, HENRY SAMUEL MonTo'N.

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